Unitus DSpacehttp://http://dspace.unitus.it:80
The DSpace digital repository system captures, stores, indexes, preserves, and distributes digital research material.Tue, 03 Mar 2015 20:26:02 GMT2015-03-03T20:26:02ZEcogeography of Perennial Legume Collecting Missions in Italyhttp://hdl.handle.net/2067/1359
Title: Ecogeography of Perennial Legume Collecting Missions in Italy
Authors: Russi, Luigi; Bennett, Sarita Jane; Pagnotta, Mario Augusto; Norman, Hayley; Nutt, Brad; Porqueddu, Claudio; Cagiotti, Mauro Roberto; Snowball, Richard; Moore, G.
Abstract: An ecogeographic survey was conducted in three regions of Italy in 1999. The
three regions selected for the survey were central Italy, Sicily and Calabria, and
Sardinia. A total of seventy-nine sites were visited across the three regions in
May when the botanical composition of perennial legume species was documented,
including recording companion annual species. Detailed ecogeographic
information was collected at each site, and soil samples were taken for later
laboratory analysis. Climate data for each site were obtained from the Central
Bureau of Agricultural Ecology. The sites were revisited in July to collect seed
of the perennial species.
One hundred and forty-seven legume species were identified, fifty-two of
which were perennial. The most common perennial species were Trifolium
pratense, T. repens and Lotus corniculatus, and these were also found to be the
species with the widest distributions. Species distribution and site variability was
analysed using #-rneans clustering. This identified eleven different climate
clusters and nine soil clusters. Particularly acid soils were rare. Cross-tabulation
of soil and climate clusters resulted in several environment combinations,
which could be explained by geography to a limited extent.
The results obtained in this study provide useful preliminary information in
the search for perennial legumes for the farming systems of southern Australia,
particularly in areas with acid soils.Tue, 31 Dec 2002 23:00:00 GMThttp://hdl.handle.net/2067/13592002-12-31T23:00:00ZEvaluation of perennial legumes collected in Italy: First year datahttp://hdl.handle.net/2067/1360
Title: Evaluation of perennial legumes collected in Italy: First year data
Authors: Pagnotta, Mario Augusto; Bennett, Sarita Jane; Cocks, Philip S.; Ewing, Mike A.; Howieson, John; Moore, G.; Norman, Hayley; Nutt, Brad; Porqueddu, Claudio; Russi, Luigi; Snowball, Richard
Abstract: Ecotype variation was studied between and within different perennial legumes species collected in three Italian regions: Calabria-Sicily, Tuscany-Lathium-Umbria, and Sardinia. The germplasms have been evaluated at the Tuscia University’s experimental field in a randomised block design with two replications, each plot consisted of about 12 plants.
Eighteen morphological characters have been evaluated and analysed using analysis of variance, principal components analysis, and discriminant analysis, correlation between morphological characters and edaphic factors of the collection sites were performed. The analyses were run both considering all the species of the trail, and focusing only on the species with more accessions, i.e. Trifolium pratense, Medicago lupulina and Lotus. The major differences were, as expected, between species, but there were also some statistical differences between accessions.
There were weak correlations between morphological characters and environmental conditions of the collection site. Considering all the evaluated collection as a whole, the environmental factor with the highest number of correlations was pH; it affected the plant structure (petiole length and internodes), the flowering time and seed production.
Some of the species did not flower at all as Astragalus monspessulanus, Trifolium hybridum, and Argyrolobium zanonii. M. lupulina was the earlier species, while Lotus was later beginning to flower in June.
Utilizing a discriminant analysis with all the characteristics recorded and the species as a grouping strategy, it was possible to monitor the similarity between species. Some species were very similar as, for example, the clovers and the Lotus, whereas other were sharply different as, for example, Psoralea bituminosa.Tue, 31 Dec 2002 23:00:00 GMThttp://hdl.handle.net/2067/13602002-12-31T23:00:00Z